package com.quick.netty.sample3;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

public class NettyClient {
    public static void main(String[] args) throws InterruptedException {
        // 客户端需要一个事件循环组
        EventLoopGroup eventExecutors = new NioEventLoopGroup();

        try {

            // 创建客户端启动对象
            // 注意客户端使用的不是 ServerBootstrap 而是Bootstrap
            Bootstrap bootstrap = new Bootstrap();

            bootstrap.group(eventExecutors)// 设置线程组
                    .channel(NioSocketChannel.class) // 设置客户端通道的实现类
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel socketChannel) throws Exception {
                            socketChannel.pipeline().addLast(new NettyClientHandler());// 加入自己的处理器
                        }
                    });

            System.out.println("客户端 ok...");

            // 启动客户端去连接服务器
            // channelfuture 要分析，涉及到netty的异步模型
            ChannelFuture channelFuture = bootstrap.connect("127.0.0.1", 6668).sync();

            // 给关闭通道进行监听
            channelFuture.channel().closeFuture().sync();
        } finally {
            eventExecutors.shutdownGracefully();
        }
    }
}
